Oil cleaningRemoval of particles and water from gear oil.Marine Propulsion Systems

Evaporation – removal of water from lubrication oil

We make oil greener

One of the root causes of mechanical failures is con­taminated oil. Maintaining oil quality by evaporating water, even emulsified water and particulates helps to:

• reduce mechanical failures and downtime• reduce operating costs• fewer oil top ups between changes• increase lifetime of the equipment.

All these benefits combined will make your business greener.

It’s a challenge to keep lubrication oil free of water. An oil cleaning system can help to remove parti-cles and water from oil, even emul-sified water.

Heater

Pre-filter

Pump

Flow tank

How does the oil cleaning work?

• Oil from the thruster system is heated• The pre-filter removes coarse particles• Pump presses the oil through the filter• Water will be evaporated, collected

and removed in the top of the unit• The cotton filter removes particles

down to 1 to 3 micron• Cleaned oil will be returned to the

thruster system

Filter

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Biodegradable lubrication oil

The use of biodegradable or EAL­oil (Environmentally Acceptable Lubricant), requires stricter standards for the oil to be kept free of water in thrusters and other systems. Biodegradable oil degrades in water, which means that the oil must be free of water otherwiseit decomposes inside the system. Most oil suppliers recommend that biodegradable oil should not have a higher water content than 0.1% (1000 ppm). Therefore, an oil cleaning system is highly recommended.

Water leakage test of biodegradable oilA test has been carried out on biodegradable oil focusing especially on removing water content from this type of oil.New oil contains around 200­300 ppm or 0.02% to 0.03% of water. To simulate water leakage, sea water was added to the oil to a level of 2.5% (25,000 ppm).After 4 hours of cleaning, both the number of particles and water content was lower than in new oil.

Number of particles >5 micron

Water in ppm

Water in %

NAS* grade

New oil 11,410 254 0.0254 6

After added water 18,847 25,000 2.5 7

After 2 hours of cleaning 16,573 1,800 0.18 6

After 4 hours of cleaning 3,723 158 0.0158 4

The core of the oil cleaning system is the filter, constructed to maintain high oil quality of lubri­cating oil systems. To ensure high oil quality, the filter cleanse both particles and water simul­taneously, including emulsified water.

Heating element

Nozzle

Pure cotton filter

Clean oil return

Patentedevaporationchamber

Evaporation valve

Regulated flow 40 l/hr(contaminated oil)

Oil cleaning system at a glance• Useable for all types of oil

• Cotton filter and water evaporator

• When operated continuously 600 liters oil per filter per day can be cleaned

• Cleanses the oil to a better quality than new oil

• Removes water, particles as well as gas

• Small investment with a high impact on oil quality

• Significant cost savings

• Extends the lifetime of oil by 10 to 15 times

• Clean oil – fewer mechanical failures and less downtime

• Supports an environmentally friendly use of oil

*National Aerospace Standard

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ZF Marine Krimpen B.V.Zaag 27, P.O. Box 20202930 AA Krimpen aan de LekThe NetherlandsPhone +31 180 331000info.thruster@zf.com

www.zf.com/marine

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